view src/cdrom/macosx/SDL_syscdrom.c @ 1348:40d0975c1769

Date: Mon, 6 Feb 2006 11:41:04 -0500 From: "mystml@adinet.com.uy" Subject: [SDL] ALT-F4 using DirectX My game isn't getting SDL_QUIT when I press ALT-F4 using the DirectX driver; it does get SDL_QUIT when I press the red X in the window. I tracked this down to DX5_HandleMessage() in SDL_dx5events.c; WM_SYSKEYDOWN is being trapped and ignored which causes Windows not to post a WM_CLOSE, hence no SDL_QUIT is being generated. The relevant code is this : /* The keyboard is handled via DirectInput */ case WM_SYSKEYUP: case WM_SYSKEYDOWN: case WM_KEYUP: case WM_KEYDOWN: { /* Ignore windows keyboard messages */; } return(0); If I comment the WM_SYSKEYDOWN case, it falls through DefWindowProc() and ALT-F4 starts working again. I'm not sure about the best way to fix this. One option is handling ALT-F4 as a particular case somehow, but doesn't sound good. Another option would be to handle WM_SYSKEYDOWN separately and breaking instead of returning 0, so processing falls through and goes to DefWindowProc which does The Right Thing (TM). This seems to be the minimal change that makes ALT-F4 work and normal keyboard input continues to work. Does this sound reasonable? Am I overlooking anything? Do I submit a patch? --Gabriel
author Sam Lantinga <slouken@libsdl.org>
date Wed, 08 Feb 2006 17:19:43 +0000
parents 604d73db6802
children d910939febfa
line wrap: on
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/

#include "SDL_syscdrom_c.h"

#pragma mark -- Globals --

static FSRef**         tracks;
static FSVolumeRefNum* volumes;
static CDstatus        status;
static int             nextTrackFrame;
static int             nextTrackFramesRemaining;
static int             fakeCD;
static int             currentTrack;
static int             didReadTOC;
static int             cacheTOCNumTracks;
static int             currentDrive; /* Only allow 1 drive in use at a time */

#pragma mark -- Prototypes --

static const char *SDL_SYS_CDName   (int drive);
static int         SDL_SYS_CDOpen   (int drive);
static int         SDL_SYS_CDGetTOC (SDL_CD *cdrom);
static CDstatus    SDL_SYS_CDStatus (SDL_CD *cdrom, int *position);
static int         SDL_SYS_CDPlay   (SDL_CD *cdrom, int start, int length);
static int         SDL_SYS_CDPause  (SDL_CD *cdrom);
static int         SDL_SYS_CDResume (SDL_CD *cdrom);
static int         SDL_SYS_CDStop   (SDL_CD *cdrom);
static int         SDL_SYS_CDEject  (SDL_CD *cdrom);
static void        SDL_SYS_CDClose  (SDL_CD *cdrom);

#pragma mark -- Helper Functions --

/* Read a list of tracks from the volume */
static int LoadTracks (SDL_CD *cdrom)
{
    /* Check if tracks are already loaded */
    if  ( tracks[cdrom->id] != NULL )
        return 0;
        
    /* Allocate memory for tracks */
    tracks[cdrom->id] = (FSRef*) SDL_calloc (1, sizeof(**tracks) * cdrom->numtracks);
    if (tracks[cdrom->id] == NULL) {
        SDL_OutOfMemory ();
        return -1;
    }
    
    /* Load tracks */
    if (ListTrackFiles (volumes[cdrom->id], tracks[cdrom->id], cdrom->numtracks) < 0)
        return -1;

    return 0;
}

/* Find a file for a given start frame and length */
static FSRef* GetFileForOffset (SDL_CD *cdrom, int start, int length,  int *outStartFrame, int *outStopFrame)
{
    int i;
    
    for (i = 0; i < cdrom->numtracks; i++) {
    
        if (cdrom->track[i].offset <= start &&
            start < (cdrom->track[i].offset + cdrom->track[i].length))
            break;
    }
    
    if (i == cdrom->numtracks)
        return NULL;
        
    currentTrack = i;

    *outStartFrame = start - cdrom->track[i].offset;
    
    if ((*outStartFrame + length) < cdrom->track[i].length) {
        *outStopFrame = *outStartFrame + length;
        length = 0;
        nextTrackFrame = -1;
        nextTrackFramesRemaining = -1;
    }
    else {
        *outStopFrame = -1;
        length -= cdrom->track[i].length - *outStartFrame;
        nextTrackFrame = cdrom->track[i+1].offset;
        nextTrackFramesRemaining = length;
    }
    
    return &tracks[cdrom->id][i];
}

/* Setup another file for playback, or stop playback (called from another thread) */
static void CompletionProc (SDL_CD *cdrom)
{
    
    Lock ();
    
    if (nextTrackFrame > 0 && nextTrackFramesRemaining > 0) {
    
        /* Load the next file to play */
        int startFrame, stopFrame;
        FSRef *file;
        
        PauseFile ();
        ReleaseFile ();
                
        file = GetFileForOffset (cdrom, nextTrackFrame, 
            nextTrackFramesRemaining, &startFrame, &stopFrame);
        
        if (file == NULL) {
            status = CD_STOPPED;
            Unlock ();
            return;
        }
        
        LoadFile (file, startFrame, stopFrame);
        
        SetCompletionProc (CompletionProc, cdrom);
        
        PlayFile ();
    }
    else {
    
        /* Release the current file */
        PauseFile ();
        ReleaseFile ();
        status = CD_STOPPED;
    }
    
    Unlock ();
}


#pragma mark -- Driver Functions --

/* Initialize */
int SDL_SYS_CDInit (void) 
{
    /* Initialize globals */
    volumes = NULL;
    tracks  = NULL;
    status  = CD_STOPPED;
    nextTrackFrame = -1;
    nextTrackFramesRemaining = -1;
    fakeCD  = SDL_FALSE;
    currentTrack = -1;
    didReadTOC = SDL_FALSE;
    cacheTOCNumTracks = -1;
    currentDrive = -1;
    
    /* Fill in function pointers */
    SDL_CDcaps.Name   = SDL_SYS_CDName;
    SDL_CDcaps.Open   = SDL_SYS_CDOpen;
    SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
    SDL_CDcaps.Status = SDL_SYS_CDStatus;
    SDL_CDcaps.Play   = SDL_SYS_CDPlay;
    SDL_CDcaps.Pause  = SDL_SYS_CDPause;
    SDL_CDcaps.Resume = SDL_SYS_CDResume;
    SDL_CDcaps.Stop   = SDL_SYS_CDStop;
    SDL_CDcaps.Eject  = SDL_SYS_CDEject;
    SDL_CDcaps.Close  = SDL_SYS_CDClose;

    /* 
        Read the list of "drives"
        
        This is currently a hack that infers drives from
        mounted audio CD volumes, rather than
        actual CD-ROM devices - which means it may not
        act as expected sometimes.
    */
    
    /* Find out how many cd volumes are mounted */
    SDL_numcds = DetectAudioCDVolumes (NULL, 0);

    /*
        If there are no volumes, fake a cd device
        so tray empty can be reported.
    */
    if (SDL_numcds == 0) {
    
        fakeCD = SDL_TRUE;
        SDL_numcds = 1;
        status = CD_TRAYEMPTY;
        
        return 0;
    }
    
    /* Allocate space for volumes */
    volumes = (FSVolumeRefNum*) SDL_calloc (1, sizeof(*volumes) * SDL_numcds);
    if (volumes == NULL) {
        SDL_OutOfMemory ();
        return -1;
    }
    
    /* Allocate space for tracks */
    tracks = (FSRef**) SDL_calloc (1, sizeof(*tracks) * (SDL_numcds + 1));
    if (tracks == NULL) {
        SDL_OutOfMemory ();
        return -1;
    }
    
    /* Mark the end of the tracks array */
    tracks[ SDL_numcds ] = (FSRef*)-1;
    
    /* 
        Redetect, now save all volumes for later
        Update SDL_numcds just in case it changed
    */
    {
        int numVolumes = SDL_numcds;
        
        SDL_numcds = DetectAudioCDVolumes (volumes, numVolumes);
        
        /* If more cds suddenly show up, ignore them */
        if (SDL_numcds > numVolumes) {
            SDL_SetError ("Some CD's were added but they will be ignored");
            SDL_numcds = numVolumes;
        }
    }
    
    return 0;
}

/* Shutdown and cleanup */
void SDL_SYS_CDQuit(void)
{
    ReleaseFile();
    
    if (volumes != NULL)
        free (volumes);
        
    if (tracks != NULL) {
    
        FSRef **ptr;
        for (ptr = tracks; *ptr != (FSRef*)-1; ptr++)
            if (*ptr != NULL)
                free (*ptr);
            
        free (tracks);
    }
}

/* Get the Unix disk name of the volume */
static const char *SDL_SYS_CDName (int drive)
{
    OSStatus     err = noErr;
    HParamBlockRec  pb;
    GetVolParmsInfoBuffer   volParmsInfo;
   
    if (fakeCD)
        return "Fake CD-ROM Device";

    pb.ioParam.ioNamePtr = NULL;
    pb.ioParam.ioVRefNum = volumes[drive];
    pb.ioParam.ioBuffer = (Ptr)&volParmsInfo;
    pb.ioParam.ioReqCount = (SInt32)sizeof(volParmsInfo);
    err = PBHGetVolParmsSync(&pb);

    if (err != noErr) {
        SDL_SetError ("PBHGetVolParmsSync returned %d", err);
        return NULL;
    }

    return volParmsInfo.vMDeviceID;
}

/* Open the "device" */
static int SDL_SYS_CDOpen (int drive)
{
    /* Only allow 1 device to be open */
    if (currentDrive >= 0) {
        SDL_SetError ("Only one cdrom is supported");
        return -1;
    }
    else
        currentDrive = drive;

    return drive;
}

/* Get the table of contents */
static int SDL_SYS_CDGetTOC (SDL_CD *cdrom)
{
    if (fakeCD) {
        SDL_SetError (kErrorFakeDevice);
        return -1;
    }
    
    if (didReadTOC) {
        cdrom->numtracks = cacheTOCNumTracks;
        return 0;
    }
    
    
    ReadTOCData (volumes[cdrom->id], cdrom);
    didReadTOC = SDL_TRUE;
    cacheTOCNumTracks = cdrom->numtracks;
    
    return 0;
}

/* Get CD-ROM status */
static CDstatus SDL_SYS_CDStatus (SDL_CD *cdrom, int *position)
{
    if (position) {
        int trackFrame;
        
        Lock ();
        trackFrame = GetCurrentFrame ();
        Unlock ();
    
        *position = cdrom->track[currentTrack].offset + trackFrame;
    }
    
    return status;
}

/* Start playback */
static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
{
    int startFrame, stopFrame;
    FSRef *ref;
    
    if (fakeCD) {
        SDL_SetError (kErrorFakeDevice);
        return -1;
    }
    
    Lock();
    
    if (LoadTracks (cdrom) < 0)
        return -2;
    
    if (PauseFile () < 0)
        return -3;
        
    if (ReleaseFile () < 0)
        return -4;
    
    ref = GetFileForOffset (cdrom, start, length, &startFrame, &stopFrame);
    if (ref == NULL) {
        SDL_SetError ("SDL_SYS_CDPlay: No file for start=%d, length=%d", start, length);
        return -5;
    }
    
    if (LoadFile (ref, startFrame, stopFrame) < 0)
        return -6;
    
    SetCompletionProc (CompletionProc, cdrom);
    
    if (PlayFile () < 0)
        return -7;
    
    status = CD_PLAYING;
    
    Unlock();
    
    return 0;
}

/* Pause playback */
static int SDL_SYS_CDPause(SDL_CD *cdrom)
{
    if (fakeCD) {
        SDL_SetError (kErrorFakeDevice);
        return -1;
    }
    
    Lock ();
    
    if (PauseFile () < 0) {
        Unlock ();
        return -2;
    }
    
    status = CD_PAUSED;
    
    Unlock ();
    
    return 0;
}

/* Resume playback */
static int SDL_SYS_CDResume(SDL_CD *cdrom)
{
    if (fakeCD) {
        SDL_SetError (kErrorFakeDevice);
        return -1;
    }
    
    Lock ();
    
    if (PlayFile () < 0) {
        Unlock ();
        return -2;
    }
        
    status = CD_PLAYING;
    
    Unlock ();
    
    return 0;
}

/* Stop playback */
static int SDL_SYS_CDStop(SDL_CD *cdrom)
{
    if (fakeCD) {
        SDL_SetError (kErrorFakeDevice);
        return -1;
    }
    
    Lock ();
    
    if (PauseFile () < 0) {
        Unlock ();
        return -2;
    }
        
    if (ReleaseFile () < 0) {
        Unlock ();
        return -3;
    }
        
    status = CD_STOPPED;
    
    Unlock ();
    
    return 0;
}

/* Eject the CD-ROM (Unmount the volume) */
static int SDL_SYS_CDEject(SDL_CD *cdrom)
{
    OSStatus err;
	HParamBlockRec  pb;
    
    if (fakeCD) {
        SDL_SetError (kErrorFakeDevice);
        return -1;
    }
    
    Lock ();
    
    if (PauseFile () < 0) {
        Unlock ();
        return -2;
    }
        
    if (ReleaseFile () < 0) {
        Unlock ();
        return -3;
    }
    
    status = CD_STOPPED;
    
	// Eject the volume
	pb.ioParam.ioNamePtr = NULL;
	pb.ioParam.ioVRefNum = volumes[cdrom->id];
	err = PBUnmountVol((ParamBlockRec *) &pb);

	if (err != noErr) {
        Unlock ();
		SDL_SetError ("PBUnmountVol returned %d", err);
		return -4;
	}
    
    status = CD_TRAYEMPTY;

    /* Invalidate volume and track info */
    volumes[cdrom->id] = 0;
    free (tracks[cdrom->id]);
    tracks[cdrom->id] = NULL;
    
    Unlock ();
    
    return 0;
}

/* Close the CD-ROM */
static void SDL_SYS_CDClose(SDL_CD *cdrom)
{
    currentDrive = -1;
    return;
}